PlantaeDB Logo
Login Sign-up

Genus Camarea in Tribe Gaudichaudieae

In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.

Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.

Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).

Do you wish to read more about plant taxonomy? Click here!

Genus Description

Suggest a correction!

Camarea (A.St.-Hil.) is a genus of flowering plants in the family Malpighiaceae, comprising approximately 10-15 species of shrubs and subshrubs native to South America. The type species is Camarea ericoides A.St.-Hil., which was described by Saint-Hilaire in 1828 when the genus was first established. The genus is primarily distributed across Brazil, particularly in the cerrados and campos rupestres of the central and southeastern regions, with additional populations in Paraguay and Argentina (WFO, 2024; POWO, 2024).

The genus is distinguished by its characteristic opposite, entire leaves with prominent stipules, and distinctive yellow to orange flowers borne in axillary or terminal racemes. The flowers typically have five sepals, five petals, and ten stamens, with the ovary being superior and containing multiple ovules. The fruit is typically a samara with membranous wings, adapted for wind dispersal. Vegetatively, Camarea species often exhibit xeromorphic adaptations including small, leathery leaves and reduced internodes (Anderson, 2007).

Species diversity is concentrated in the Brazilian highlands, with several endemic species restricted to specific mountain ranges or cerrado fragments. The genus occupies elevations from 200 to 1800 meters, typically in open, sunny habitats with well-drained, nutrient-poor soils characteristic of the neotropical savanna biome. Several species show high degrees of local endemism, particularly those from the campos rupestres of Minas Gerais and Goiás (Anderson, 2007).

Pollination in Camarea is primarily entomophilous, with bees serving as the main pollinators for most species. The base chromosome number for the genus is x=6, based on limited cytological studies of several species. Dispersal is primarily anemochorous through the winged samaras (Anderson, 2007).

Taxonomically, Camarea has been recognized as a distinct genus within Malpighiaceae, though some historical treatments have suggested close relationships with related genera like Byrsonima. Recent molecular phylogenetic studies confirm its placement within the neotropical clade of Malpighiaceae, supporting the traditional circumscription (Davis & Anderson, 2010). No major re-circumscriptions or synonymizations have been proposed recently.

Several Camarea species are cultivated as ornamentals in specialized collections due to their attractive flowers and drought tolerance, though the genus has limited commercial importance. Some species occasionally appear in horticultural trade, particularly in rock gardens or drought-tolerant plantings (Anderson, 2007).

Conservation concerns exist for several narrowly endemic species due to habitat loss from agricultural expansion and mining activities. The restricted distribution and specialized habitat requirements of many species make them particularly vulnerable to environmental changes. Continued taxonomic work and population monitoring are needed to assess the conservation status of less-known species (IUCN, 2023; Anderson, 2007).

Pick a Species to see its components: